Half to daniel madlem



(No Model.)

B. G. TIPPETT.

CAN OPENER.

N0.- 331,923. Patented Dec. 8, 1885.

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WITNESSES c ou N. PETERS, PhutoLulmgnpher, Wnshfinglun. ac

UNITED STATES PATENT Fries.

ROBERT G. TIPPE-TT, OF READING, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO DANIEL MADLEM, OF SAME PLACE.

CAN-OPENER.

SPECIFICATION forming part of Letters Patent No. 331,923, dated December 8, 1885.

Application filed September 21, 1885. Serial No.177,668. (No model.)

To all whom it may concern:

Be it known that 1, ROBERT G. TIPPETT, a citizen of the United States, residing at the city of Reading, county of Berks, State of Pennsylvania, have invented a new and useful Improvement in Gan-Openers, of which the following is a specification.

This improvement pertains more particularly to the class of can-openers provided with a revolving-disk cutter.

The object of the improvementis to provide a cheap, reliable, and efiective can-opener, adjustable as to diameter of opening to be made in the can. and that will leave a clean edge to the opening when out.

The above objects are attained in the use of the can-opener shown in the drawings here with, in which similar letters of reference indicate similar parts.

Figure 1 represents the can-opener in perspective from the rear of the disk-cutter, showing the adjustingkey. Fig. 2 is a plan of the same from the top. Fig. 3 represents the preferred mode of mounting the cutter, shown in section. Fig. 4 is a modified construction in section; Fig. 5, an end view of the cutter from the hub side, showing the bar in section, in all of which A is the handle; 13, the bar of bright wire, of the section shown in Fig. 5, having a flattened surface, B, and the usual cranked point, B

0 represents a detachably-movable hub provided with a bore adapted to slide freely upon the bar B, having an offset-shoulder, O, as a bearing for the cutter, and a shouldered offset, 0 adapted to receive the collar or washer D. A half-round key, E, or a dovetail key, F, secures the hub to its adjusted position upon the bar, the same sliding transversely in their respective seats, (3 or F. The cutters G are circular disks stamped out of sheet-steel, being perforated to suit the seat or bearing 0, and are strung upon a mandrel, and with a suitable tool sliding between each pair of cutters turned or sharpened at the proper angle. The hubs being provided, as shown in Fig. 3, the cutter G is slipped upon its bearing 0'. The collar D is then placed upon its shouldered oiiset 0 leaving the cutter just free to revolve without Wabbling, and the end of the offset slightly riveted over upon the washer. This secures the out ter in place; or if the hub in Fig. 4 is used, in

which the washer or collar D is an integral portion of the hub O, the cutter is slipped upon the seat 0, and a sleeve, H, of the proper length, and with a bore adapted to the extension O, is slightly heated to expand the same, and is then slid upon 0 against the shoulder of O'and left to cool, when it contracts and secures the cutter Gin place, as before. It will be evident that it is cheaply constructed.

To use the device the point is driven through the top of the can as near the center as the eye will direct. Then loosening the key, the hub with the cutter is slid toward or from the handle to the desired point, preferably so that the hub portion shall project partly over the outer edge of the top. The key is then pressed into place, and bearing down upon the handle, the cutter forces an entrance through the top and the hub rests upon the edge of the can. The cranked point beneath the can-top acting as the fulcrum for the force, the handle, still pressed upon,is moved around the can, the cutter plowing its way with an easy revolving movement and turning down the edge of the out next to the periphery of the can, andleaving on the completion of the movement a nice clean circular opening in the can.

I am aware that circular-disk cutters and cranked point-bars have been used prior to my improvement; (see Patent No. 150.563, May 5, 1874, to Albert H. Hall, and N 0. 50,011, September 19, 1865, to S. D. Lecornpt, can-openers;) but I believe myself to be the first to provide a rigid adjustment radially of a mov able revolving cutter upon a plain bar, and revolving upon a bearing concentric with the crosssection of said bar.

Having shown the construction, use, and

advantages of my canopener, I desire to secure by Letters Patent the following claim thereon:

In a can-opener, the combination of the bar 13, hub O, and the disk-cutter G, revolving upon the hub-bearing O, concentric with said bar, and secured upon said hub by the collar D, being movably adj ustahle upon the bar by key F, in contact with surface B, substantially as shown, described, and for the purpose set forth.

lVitncsses: ROBERT G. TIPPEII.

JAMES R. KEXNEY, JosEPH GANSTER.

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